Magnetic storm observations from the Prague-Clementinum observatory on 1841-12-30

Data of magnetic storms recorded at the Prague-Clementinum observatory in 1839-1849 are presented. The data were obtained by digitising and processing the original old records published in the yearbooks of this historical observatory. The data set contains variation of declination [min] and horizontal magnetic field [nT] of 73 magnetic storms with the magnitudes being of at least a moderate level completed with the baseline of declination [deg] and baseline of horizontal megnetic field [nT]. All time data were transformed into UT, based on the longitude of the Göttingen observatory, which was 9.950°. The time shift is thus 39'48''. The date in the file name indicates the start day of the storm.本数据集呈现了1839年至1849年间于布拉格克莱门汀天文台（Prague-Clementinum observatory）观测得到的地磁暴数据。该数据集的原始数据源自该历史天文台年鉴中刊发的老旧观测记录，经数字化转换与后期处理后得到。数据集包含73次中等强度及以上地磁暴的磁偏角（declination）变化量（单位：角分，min）与水平磁场（horizontal magnetic field）强度变化量（单位：纳特，nT），同时附带磁偏角基准值（单位：度，deg）与水平磁场基准值（单位：纳特，nT）。所有时间数据均基于哥廷根天文台（Göttingen observatory）的经度（9.950°）转换为世界时（UT），对应的时间偏移量为39分48秒。文件名中所载日期代表对应地磁暴的起始日期。